No one is going to accept your beliefs with open arms, you are going to offend them no matter what, unless you hide it and just get religious vows, but you shouldn't have to do that.

Google 'atheist wedding ceremony/vows'. There are a number of excellent samples and suggestions of ceremonies and vows which would met your needs and avoid offending anyone.

I see. Do you have a question for us?

I recently performed a wedding ceremony for my brother. I am an atheist, as is my brother and his new wife. I don't think that there is much point in having an ATHEIST wedding...you are announcing your love and commitment, not your cause. You can announce your cause some other time, so that you don't mar the ceremony for your spectators. I think that rather than have an "atheist" wedding, you merely have a secular one. You don't have to say that you reject this or that god, you can just simply not mention god at all. There is a multitude of secular wedding readings available on line if you search "secuar wedding readings" and some of them are incredible. Or make it more personal and do what I did; write your own reading, using the online versions as a guide or template. Invoke love instead of God, faith in eachother instead of in a higher power, highlight the short period of time you will have together on Earth, etc. Instead of an opening prayer, give a welcome to the congregation and ask if they give their approval of the marriage, right up front, to get them to feel like they are a part of what is happening. DON'T isolate people - this should be a joyous occasion for you and all of your invited guests! My family and most of the spectators at my brother's wedding were very religious, many of them Mormon, (my grandma works in a Mormon temple) and everyone at the wedding commented on my words in a very positive and gracious manner...actually people RAVED about it (odd since I was dressed as a pirate, a la the "clergy" of The Church of the Flying Spaghetti Monster) It is still possible to have a touching ceremony without using the old cliches of god and "holy" matrimony. Choose your own vocabulary of special terms to replace the religious ones, and this can be a high-class event.